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/* * copyright (c) 2007 Michael Niedermayer <[email protected]> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef AVUTIL_AES_H #define AVUTIL_AES_H #include <stdint.h> #include "attributes.h" #include "version.h" /** * @defgroup lavu_aes AES * @ingroup lavu_crypto * @{ */ extern const int av_aes_size; struct AVAES; /** * Allocate an AVAES context. */ struct AVAES *av_aes_alloc(void); /** * Initialize an AVAES context. * @param key_bits 128, 192 or 256 * @param decrypt 0 for encryption, 1 for decryption */ int av_aes_init(struct AVAES *a, const uint8_t *key, int key_bits, int decrypt); /** * Encrypt or decrypt a buffer using a previously initialized context. * @param count number of 16 byte blocks * @param dst destination array, can be equal to src * @param src source array, can be equal to dst * @param iv initialization vector for CBC mode, if NULL then ECB will be used * @param decrypt 0 for encryption, 1 for decryption */ void av_aes_crypt(struct AVAES *a, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt); /** * @} */ #endif /* AVUTIL_AES_H */